How modify fields in JIRA with HTTP request in HttpURLConnection?

[Amine Chefiri]

I tried with the following example but it does not work 

public static void main(String[] args) {
        
		String data = "{\"fields\":{\"customfield_10005\":\"test\"}}";

  		this.authenticate();
  
 		URL url = new URL("http://jira.sylob.local/rest/api/2/issue/105868?  fields=customfield_10005");
            
  		HttpURLConnection connection =  this.httpGet(url.toString(), this.authCookie);
		
		OutputStreamWriter osw = new OutputStreamWriter(connection.getOutputStream());
            osw.write(data);
            osw.flush();
}
 
private void authenticate() throws Exception {
        StringBuilder authUrl = new StringBuilder("http://").append("jira.sylob.local").append("/rest/auth/1")
                .append("/session").append("?os_username=")
                .append(URLEncoder.encode("support", GeneralStatic.UTF8)).append("&os_password=")
                .append(URLEncoder.encode("support81", GeneralStatic.UTF8));
        HttpURLConnection connection =
            (HttpURLConnection) new URL(authUrl.toString()).openConnection();
        String cookie = "";
        mainLoop: for (Entry<String, List<String>> headers : connection.getHeaderFields()
            .entrySet()) {
            if (StringUtils.equals(headers.getKey(), "Set-Cookie")) {
                for (String cookieTmp : headers.getValue()) {
                    if (StringUtils.containsIgnoreCase(cookieTmp, "JSESSION")) {
                        cookie = cookieTmp;
                        break mainLoop;
                    }
                }
            }
        }
        if (StringUtils.isEmpty(cookie)) {
            throw new StandardCochiseMetierException(new CochiseMessage(
                "importTempsJIRA.exception.authentification"));
        }
        this.authCookie = cookie;
    }

private static HttpURLConnection httpGet(String url, String cookie) throws Exception {
        HttpURLConnection connection = (HttpURLConnection) new URL(url).openConnection();
        connection.setRequestProperty("Content-Type", "application/json");
        connection.setRequestProperty("Accept", "application/json");
        connection.setRequestMethod("PUT");
        connection.setDoInput(true);
        connection.setDoOutput(true);
        if (StringUtils.isNotEmpty(cookie)) {
            connection.setRequestProperty("Cookie", cookie);
        }
        connection.connect();
        return connection;
    }

Please Can you help me

[Vasiliy Zverev]

Whan namely does not work? Do you get any mistake or responce for this?